interface StartStop {
	void start();
	void stop();
	
}

class Meeting implements StartStop {
	public void start() {
		System.out.println("Meeting starts");
	}

	public void stop() {
		System.out.println("Meeting stops");
	}
}

class Car implements StartStop {
	public void start() {
		System.out.println("Car starts");
	}

	public void stop() {
		System.out.println("Car stops");
	}
}
class Main {
	public static void main(String[] args) {
		StartStop[] a = {new Meeting(), new Car()};
		for (int i = 0; i < a.length; i++) {
			a[i].start();
			a[i].stop();
		}
	}
}
